Mr. Perfect starts pretty solidly, in the span of 10 minutes they fully set up Park Se Jin's character in an efficient and enjoyable manner. After that however, the story starts to meander into the realm of predictability.
A little disclaimer, I did not read the synopsis for this going into the movie. However by the time the brunt of the main plot began I could tell you the direction this movie was going and even guessed the ending.

The saving grace of this movie was the great cast. Thus far I've only seen Yoon Shi Yoon as the lead in Psychopath Diary, he absolutely kills it in that but I was still expecting less from him because this movie is 5 years old (and I thought it was 10 years old when I started it). He delivered a very endearing performance without speaking.

Next to him you have the amazing Yeo Jin Goo, who's character had the most range of emotions needed. He nailed every single one of them.

Any time those two were on screen together I forgot I was watching fiction and felt very strongly for the characters and their situation.

This is not a movie I'd rewatch, but I do know I'd recommend it to friends who enjoy heart warming movies.